Power packs provide 24VDC operating voltage to all Watt Stopper 24VDC occupancy sensors and LightSaver controllers. Auxiliary relay packs are similar to power packs but have no transformer power supply, only an isolated relay.
Power packs consist of a transformer and highcurrent relay combined in one small, powerful package. The transformer has a primary high voltage input and a secondary, low voltage output (24 VDC,114 mA with relay connected). The secondary voltage provides operating power to Watt Stopper sensors. When the occupancy sensors detect motion or light sensors detect inadequate ambient light, they electrically close an internal circuit which sends 24 VDC back to the power or auxiliary relay packs that control the lighting system.
The B power packs are UL 2043 plenum rated with teflon coated low voltage leads and plenum rated plastic. This means that the power packs do not need to be installed in the junction box, but can be installed in the plenum. They are housed in ABS, UL-rated 94V-0 plastic enclosures.
Watt Stopper power and auxiliary relay packs are designed to be flexible enough to control almost any lighting or HVAC load. For example, power packs can control lighting circuits, self-contained air conditioners, pumps, fans, motors, VAV systems, motorized damper controls and setback thermostats. They are excellent for any application which requires high voltage switching through low voltage controls. By linking power packs and sensors, an almost unlimited number of configurations can be obtained.